Description of problem:

I am trying to build openssh (from source RPM on brew) with address sanitizer enabled


Version-Release number of selected component (if applicable):

openssh-8.0p1


How reproducible:


Step 1 - Download openssh source rpm from brew (RHEL8 version used openssh-8.0p1)

Step 2 - extract RPM, tar.gz

Step 3 - Run configure within extracted source directory with following options


$ ./configure --with-cflags="-fsanitize=address" --with-ldflags="-fsanitize=address"

# or

$ ./configure CFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address



Above command stuck at this stage 


checking for arc4random_stir... no
checking for arc4random_uniform... no
checking for ia_openinfo in -liaf... no
checking whether OpenSSL's PRNG is internally seeded... yes
checking whether SECCOMP_MODE_FILTER is declared... yes
checking kernel for seccomp_filter support... yes
checking if select works with descriptor rlimit...    <<<<<<<<<   


Background shows configure running currently at conftest


$ ps -ef | grep configure
root      233731  223357  0 03:23 pts/1    00:00:01 /bin/sh ./configure CFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address
root      241481  233731  0 03:23 pts/1    00:00:00 /bin/sh ./configure CFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address
root      241568  223376  0 03:26 pts/0    00:00:00 grep --color=auto configure
$
$ pstree -pa 223357
bash,223357
  └─configure,233731 ./configure CFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address
      └─configure,241481 ./configure CFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address
          └─conftest,241482
              └─conftest,241483
$
$ ps -ef | grep conftest
root      241482  241481 98 03:23 pts/1    00:03:16 ./conftest
root      241483  241482 99 03:23 pts/1    00:03:17 ./conftest
root      241577  223376  0 03:27 pts/0    00:00:00 grep --color=auto conftest
$



$ pwd
/root/OSSH/openssh-8.0p1
$
$ find . | grep -i conftest
./conftest.sslincver
./conftest.ssllibver
./conftest.c
./conftest
$
$ file ./conftest
./conftest: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=957aa86d3c79a9400d57fbf6d423dfdc4f4e800c, with debug_info, not stripped
$

$ strace -f -p 249471
strace: Process 249471 attached
sched_yield()                           = 0
sched_yield()                           = 0
sched_yield()                           = 0
sched_yield()                           = 0
sched_yield()                           = 0
sched_yield()                           = 0
sched_yield()                           = 0
sched_yield()                           = 0
sched_yield()                           = 0
sched_yield()                           = 0

<< snip >>

$

This seems to be related to the following test within configure.ac

# Some platforms (seems to be the ones that have a kernel poll(2)-type
# function with which they implement select(2)) use an extra file descriptor
# when calling select(2), which means we can't use the rlimit sandbox.
 AC_MSG_CHECKING([if select works with descriptor rlimit])
 AC_RUN_IFELSE(
     [AC_LANG_PROGRAM([[


If I remove the above test from configure.ac then ./configure with above flags succeeds, however make runs into following errors

<< snip >>
cc -o ssh ssh.o readconf.o clientloop.o sshtty.o sshconnect.o sshconnect2.o mux.o -L. -Lopenbsd-compat/  -Wl,-z,relro -Wl,-z,now -Wl,-z,noexecstack -fstack-protector-strong -fsanitize=address -pie  -lssh -lopenbsd-compat  -lcrypto -lutil -lz  -lcrypt -lresolv 
/usr/bin/ld: ./libssh.a(ssh-pkcs11.o): undefined reference to symbol 'dlsym@@GLIBC_2.2.5'
//usr/lib64/libdl.so.2: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make: *** [Makefile:173: ssh] Error 1
$


Actual results:

./configure hangs

Expected results:

./configure should complete, allowing me to "make" the project

Additional info:


$ cat /etc/redhat-release 
Red Hat Enterprise Linux release 8.5 (Ootpa)
$
$ uname -r
4.18.0-348.el8.x86_64
$